the body is suddenly caught by a member in such manner as to forcefully
drive the epiphyseal portions of bone into and against the diaphysis,
_multiple longitudinal_ fractures occur at the point of least
resistance. Parts so affected undergo a fibrillary separation,
increasing the transverse diameter of the bone; or if the impact has
been sufficiently violent, the portion becomes an amorphous mass.

In a treatise on the subject of lameness, the bones chiefly concerned
and most often affected must be especially considered. The shape and
size of a bone when injured, determines in a measure, the course and
probable outcome in most cases, but of first and greater importance is
the function of the bone. A fracture of the fibula in the horse need not
incapacitate the subject, but a tibial fracture is serious and generally
proves cause for fatal termination. The body of the scapula may be
completely fractured and recovery will probably result in most cases
without much attention being given to the subject, yet a fracture of the
neck of this same bone constitutes an injury of serious consequence. The
difference in the function of different parts of this same bone, as well
as its shape and mode of attachment, determine the gravity of the case;
so it is in fractures of other bones with respect to the course and
prognosis of the case--function is the important factor to be
considered.

Next in importance is the age of the animal suffering fracture of the
bone. Capacity for regeneration is naturally greater in a vigorous,
young animal than in aged or even middle-aged subjects. A healthy
condition of the bone and the body favor the process of repair in case
of fracture, and prognosis may be favorable or unfavorable, depending
upon these factors mentioned for consideration. Individuals of the same
species, differing in temperament, may comport themselves in a manner